Edge-trimming machine.



0. R. RUST. EDGE TRIMMING MACHINE,

APPLICATION TILED JUNE 6, 1908. 908,332.

Patented Dec .29,1908.

354% 45 7mm K g 9 44 4 5 aniline/aw:

O. R. RUST. EDGE TRIMMING MACHINE.

APPLICATION IILED JUNE 6, 190a.

908,332- Patented Des.29,1908.

3 SHEETS-SHEET 2.

1 0. R. RUST. EDGE TRIMMING MACHINE. APPLICATION FILED JUNE 6, 1908.

Patented Dec. 29, 1908. 3 SHEBTSSHEET 3.

UN E $.ATEE

EDG- rns mecisrmr.

Specification of Letters Patent.

Patented Bee. 29, 1908.

Application filed June 6, recs." ficrial are. seem.

T 0 all whom it may concern:

. Be it known that 1, One R. RUs'r, s citizen of the United States residing at Springfield, in thecounty of Clark and Stste'oi Ohio, have invented certain new and useful Improvements in E lge-T1immin Machines,

of which the following is a specification.

In the art of manufacturing leather bolts for apparel pur oses, es Well as in finishing strep ports forl arness, or the like, it is'cus" ternary to trim the edge portions of the belts or straps in order to produce 3, finished are ticle. This operation is ordinarily performed by hand and it is evident fleet the operation consumes considerable time and necessitetes a large amount of labor. v

The resent invention comprises e mechine w iich is designed es ecieliy for the purpose of trimming the e gcs of strap parts such es above described to facilitate the o eretion, and further more, to finish the article mechanically and much more nicely than can be eccomplishodby hand:

For a full understsndii of the invention, reference is to be had Jolie following detail description and to the eccompsnying dress ings in which Figure 1 IS a. top plan view of a. machine embodying the essential features of the present invention; Fig. 2 is a plan view bringing out more clearly the arrangement of the inter-- chenvecbly mounted sharpening mechanism for me cutters; Fig. 3 is a sectional view showing the arrangement of the cutters, the

sharpening mechanism therefor,end the gencral operating mechanism; Fig. 4 is e plan view showing the arrangement of the feed rollsend means for driving the some; Fig. 5. is e. sectional view taken about on the line b-l of Fig. 3; Fig. 6 is a detail view of the emery wheel shaft and arts in which it is moimted; Fig. 7 einbor ios dot-ell sectional views combined showing moreclearly the means for mounting each cutter upon its shaft; Fig. 8 is a detail perspective view of one of the sections of the presser plate, and Fig. 9 1S4]. sectional view 0 a strip of leather showing the formation of the e: gcs thereof after having been, run through the Ina-chine comjprising this invention. I '1 tion and on the several figures of the drewiroughout the following detail dcscripfin s, similer perts ere referred to by like re erence chersoters.

The inscliiee comprising the present invention, reference .to its specific construction more pcrticuierly, embodies a, suitable base 1, upon which are mounted feed rolls 2 end 3 between which the mcterisl to be operated upon is fed to the cutting mechenism. The iowerfeed roll 3 is mounted in verticzrlb edjiistelble bearings 4, each adapted to iie readily od'usted by moons of a screw 5 lisving a. handle 6. The feed roll 3 is spring supported, springs 7 being intera posed between the cpeer ends of the screws or stems 5 and the lower ends or" the bearings inwhich the feed roll 3 is ioorrgeled. By reason of the yielding mounting of the feed roll 3it will be apparent that the said roll will eutomsticsliy iteeli to sccommo date for pesssge of meteiiei of diiierent thicknesses between tlis'rolls 2 end 3. The feed roll 2 hes a gees 8 attached to one end thereof and this gees; meshes with e worm 9 upon an inclined shaft 18. On the upper end or the shaft 10 is fixed e. worm gear 11 in mesh with e worm 12 mounted upon a herizontel drive shaft if}, said elicit 13 being supported in suitsblo besrings in the frame wort: of the machine.

Mounted licensee-end of the drive sheit 13 is s' bevel geer is, and bevel gear 1% is mounted on the acid elicit intermediate of its ends. The goers i i mesh with bevel gears 15 cerriedliy cut-ear shafts l6. The'cuttcr shafts 16 are errengcd at en em gle to oneenothor and ere supported in suitable brackets 17 deteclmhly secured to the frame work of the machine. Cutters 18 are carried by; the lower ends of the shaft 1 6, said cutters being directly attached to split collars, 19 by means oinuts 20. The lower end portions of the shafts 16 are provided with fine threads and the collms 19 are in ternelly threaded so that by loosening screws 21 of said collars the some may beediusted slightly to correspondingly edjusssghe cutters 18, after which the screws 21 will be tightened to hold the cutters at a desired adiustment. The peculiar construction of the collars carrying the cutters 18 is shown most clearly in Fig. 7 of the drawings.

As shown most clccrly in Fig. 3 of the of this machine, as said material is ed from the feed rolls 2 and 3 to the cutting mechanlSIIl. The prcsser plate 22 is made in sec; tions which are attached to short transverse plates 23 by means of screws 24 which pass through transverse slots 25 in the sections of the nresscr plate. Springs 26 are interposed between the transverse plates 23 and a supporting head 27 comprising an integral extension of the base or bed 1 of the machine, and these springs 26 normally tend to hold the opposite edges of the presser plate 22 in contact with the lower sides of the cutters 18. By reason of the sectional construction of the presser plate 22 it will be a parent that the parts of said plate may be a 'usted laterally. in order to accommodate ior different widths'oi' stri s-of material, or strap parts, to be trimine at the edges in the operation of the invention. Mounted above the prcsser plate 22, and also arranged between the cutters 18, is a fixed cutter 28 formed at its opposite edges with beveled cutting edges coiiperating with the rotary cutters 18. The lower sides of the rotary cutters 18 are in close contact with the beveled edges of the cutter 28 and the cutters 18 thus have a shearing cutting action which is especially advantageous in that it permits of trimming the edges of a strap. part by removal of finer strip of material than can he done by hand. The trimming of the edges of the strap part by the cutters 18, as the material is fed through the cutting mechanism, is performed accurately, and the strap part is thus given a l more finished ap )earancc than can possibly be obtained when t e same is trimmed by hand. The hxcd'cuttcr 28, m amanncr sonwwhat similar to the prcsscr. plate 22, ISCOIYIPOSOd oi sections, each section having an upwarlly projecting extension 28 attached to the upper portion of the frame work of the machiney means of screws or fastenings 29. The fastenings 29 pass through slots 30 in the ex tensions 28 and permit of adjustment of the sections of the fixed cutter laterally, to .accommoda to for different widths of material. lt will be seen that when the sections of the prcsser plate 22, and the sections of the hired cutter 28, are adjusted laterally with refer ence to one another, the cutters 18 will of course be suitably adjusted upon the cutter shaft 16 for effective cooperation with the parts 22 and 28, in'a manner which will be obvious.

As shown more clearly in Fig. 8 of'the drawings each section of the prosscr plate is provided at its outer edge with W-Itlifill lugs 31 which form guide members prevent ing the stripfoi material being operated u n by the cutters from traveling sidcwisc, which might interfere with the efhciency o: the invention in accurately trimming the edges of the material. As the stra part is fed through the machine it wil be apparent that the opposite edges of the same will be trimmed simultaneously at points adj accnt to the up or side of thesaid strap part, ll it is (lSlXGu that both thcupper and lower edges of the material be trimmed, it is only necessary to inycrt the strap part and pass it through the machine ssecond time whercupon not only the upper but the lower opposite ed es will be trimmed, beveled, or rounde in the desired manner.

To position the sections of the cutter 28 so that they will remain erfectly horizontal, it is contemplated that the upper ends of the extensions 2E5 shall be formed with lateral flanges 32- entering a horizontal groove 33 in the upper portion of the machine. When /the sections of the cutter 28 are adjusted laterally the engagement (if the flanges 32 in the grooves 33 will form a guide to maintain the parts of the cutter in horizontal alinement. I

An important feature of the present inven tion resides in the provision, in connection with the feeding and cutting mechanism hereinbefore described, of special mechanism ior automatically sharpening the cutters 18 during the operation of the machine. The sharpening mechanism embodies a grinding wheel, preferably an emery wheel 34, carried by a rigid shaft section 35 one end of which is connected with flexible shutting 36. The drive shaft 13 is operated by means of suit able belt connections with a ulley wheel 37 mounted on an end of the shaft 13, and engaging a side of said pulle Wheel 37 is a friction wheel 38. The friction wheel 38 is connected with the flexible shafting 36 and said friction wheel is designed -to operate theemery wheel 34 constantly while the machine is in operation. The emery wheel shaft 35 is supported by means of a sleeve bearing 39 having an adjustable or threaded connection '40 with a knurled head 41, and the bearing 39 is formed with a lateral trunnion 42' the outer portion of which is reduced so as to ass through a-pivoted supporting arm 43. he supporting arm 43 is pivoted at 44 to the central portion of the frame work of the machine and the trunnion 42 of the sleeve -bcarmg 39 issecurcd to the arm 43 by means of a. thumb nut 45. Projecting from the frame work of the machine and arranged upon 0pposite sides of the axis of the arm 43 are two rests 46, and on the outer end of said rests scenes -with an elongated 'opening or slot 43 through which the trunnion 42 passes, and it will beiapparent that thrsleeve bearing 3% for the shaft 35-carrying the emery wheel 34 is adjustably connected with the arm-43.

T he arrangement of the )ivoted support ing arm, ivhich carries the sharpening mechanism, is such that when. this arm is supported above one of the cutters 38, the emery Wheel 34 may; be readily adjusted so as to automatically sha en such cutter 18 during the operation or the machine, as shown most clearly in Fig. of the drawings. when so arranged the supporting arm ii-Sis sup orted by the adjacent rest 46 and is ca pab e of being adjusted by moansof the adj usting screw 47 of said rest. The emery Wheel is also susceptible of other adjustment by reason of the adjustable connection be-- tween the arm 43 and the trunnion 42 of the sleeve bearing 39, and because of the adjustable connection between the sleeve bearing 39 and the head 41 thereof, the latter being attached to the shaft section 35 by means of an interlocking pinend groove connection 48 Which permits of free rotation of the shaft section 85 in the head 41, but prevents longitudinal movement of said head 41 along the said shaft section. Referring to Fig. 3 it Will be Ol)VIOIlS that the emery wheel 34 may be readily adjusted to properly sharpen the cutter 18 with which it cooperates,- and whenever necessary or desirable the arm 43 may be swung over to the opposite side of the machine above the other cutter 18 and the emery Wheel 34 so adj uste-d as to sharpen the cutter above which it is thus disposed. The flexible shaft Y 36 permits of readily swinging the sharpening mechanism from one side of the machine to the other, and l'lPClittlOI] of the sharpening mechanism when in either position. y

it will be understood that the detail construction oi my invention may be modified in accordance with the broad spirit of the invention and the scope of the appended claims.

Having thus described the invention, what is claimed as new, is:

1 In an edge trimming machine, the com bination of cutter shafts, spaced rotary cutters thereon, means for adjusting said cutters longitudinally of the shafts, mechanism for feeding material to said cutters, a fixed cult-er arranged between saidcutters for cooperation therewith, means for holding the material against the fixed cutter as it is being operated upon by the rotary cutters, and means for adjusting the fixed cutter to accomu'iodate for different widths of material and adjustment of the rotary cutters.

2. In an edge trimming machine, the omhination of spaced rotary cutters, means for adjusting said cutters, mechanism for feed ing material to the cutters, a fixed cutter cooperating With the rotary cutters, a presser plate for holding the: material a ainst the lixed cutter as it is operated upon oy the rotary cutters, the lined cutter and the presser plate comprising sections, and means for adjusting the sections of the fixed cutter and the presser plate to accommodate for diiierent Widths ofmaterial.

3, In an edge trimming machine, the combination of anguierly arranged cuttershafts, rotary cutters mounted thereon and arranged at an an is to one another, a fixed cutter arranged I etween said rotary cutters and of sectional construction, a presser late disposed below said fixed cutter and a so of sectional construction, means for adjusting the Y rotary cutters ion itudinally oi the cutter shafts, and means l or adjusting the sections of the fixed cutter and the sections of the presser plate to .accommodatej'for different widths of material fed to said cutters.

4. In an edge trimming machine, the combination of spaced rotary cutters, means for ieelling material to said cutters, a prcsser plate arranged between the cutters so as to bear a ainst a side of the material operated upon thereby, and a rigid element opposing the presscr plate and adapt-edto bear against the o posite side or" the material'operated upon the cutters.

5. In an. edge trimming machine, the combination of spaced rotary cutters, means for feeding material to said cutters, apresser late arranged between the cutters so as to bear against a side of the material operated upon thereby, a rigid element opposing thepresser plate and adapted to bear: against the opposite side ofthe material operated upon by the cutters, the presser plate comprising sections, means for adjusting said sections to accommodatefor different widths of material, means for adjusting the rotary cutters, and springs adapted to hold the presscr plate in contact with the material fed to the cutters.

6. In an edge trimmin machine, the combination of a plurality or rotary cutters, operating mechanism therefor, means for feeding material to said cutters, a pivoted supporting arm, sharpening mechanism adjustahly mounted on said supporting arm and including an emery Wheel for interchangeable coi'iperation with the cutters, rests for supporting the pivoted arm in adjusted positions, and driving means for the sharpening mechanism operated by the cutter operating mechanism. 0

7 In an edge trimming machine, the combination of a drive shaft, 21 drivewheel connected therewith, cutter shafts geared to the driveshziit and arranged at an 7 other, rumorsmounted on said cutter shafts, mechanism for funding mulvrizd to said rutters, a pivoted arm, a rigid shaft section litijustabiy mounted upon tlw iifi end of said arm, an emery wheel carried by said shaft section for interchangeable cooperation with the cutters, rests for sup )orting the pivoted arm in positlons m whlc i 11; mil cooperate with a seleciod one of the cutters, means for adjusting the position of the arm with re- I angle to each spec-t to said rests, a friction WilGGi operated by the drive WilCGi aforesaid, and flexible simi'iing commuting the rigid shaft section ilbUVi mmiiiimvd with the frictionwheei and, permitting of adjmgtment of the s harpaning mvriianism with reference to the cutters.

In tvsiimuny whereof I affix my'sigiiaituro in 1. rus0n :0 of two v-viti'iessgs.

' OTIS R. RUST.

Witnesses:

J. W. ALLEN, ARTHUR J. Tom). 

